Orplid TK

Type 4
yellow / Au 70.0
palladium-free

Composition:Au 70.0 / Ag 13.6 / Cu 9.9 / Pt 5.5 / Zn 0.9 / Ir 0.1
Standard:DIN EN ISO 22674
Colour:yellow
Melting range °C:895–925
Soft annealing:15 mins at 750 °C / quench in water
Hardening:15 mins at 450 °C / air
Preheating temperature °C:700
Casting temperature °C:1055
Further heating after melting (secs):electr.: 15–20
inductive: 5–8
flame: 5–8
Density g/cm3:15.4
Solders:Orplid solders 825, 790, 760
Vickers hardness (HV 5/30):w: 190
a: 255
g/b: 250
0.2% proof stress (MPa):w: 375
a: 620
g/b: 645
Elongation at break (%):w: 35
a: 15
g/b: 10
Spruing:Following the rules for dental applications (see General Instructions for Use)
Investment:Phosphate-bonded investment materials (Cehacast P or Cehacast Speed)
Preheating:700 °C, 30 to 120 mins until end temperature, depending on size of mould
Casting:1055 °C, possibly increase by 20°C–30°C for resistance-heated vacuum pressure
casting. Graphite crucible or open flame with ceramic crucible.
Finishing:With carbide burs and/or ceramic-bonded stones
Cleaning:Ultrasonic cleaning or steam jet cleaning
Soldering:Orplid solders 825, 790, 760
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